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a ball is bouncing the floor with the floor oscillating with a frequency"w" using hamilton equations to find the momentum and position of the ball by setting x=0 as the reference point for gravitational potential. H=p2/2m +mgx +1/2(m.w2.x2)
What is the average of the velocity squared in pure oxygen (O2) at standard pressure (1 bar) and concentration 0.001 mol/L? Give answer in (m/sec)^2
Water flows in a vertical pipe of 0.15 m diameter at a rate of 0.25 m3/s , and has a pressure of 250 kPa at an elevation of 25 m. Determine the velocity head and pressure head at elevations of 20 m and 50 m.
A 0.40-kg iron horseshoe is dropped into 1.15L of water in a 0.34-kg iron pot initially at 20.0?C. Determine the initial temperature of the hot horseshoe.
A candle is placed 16.85 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, Find the focal length of the convex mirror
A battery powers some DC circuit. When the current is 40.0 mA, the voltage available to the circuits is 11.2V. When the current is doubled the voltage available decreases to 10.4 V. What is the internal resistance of the battery?
a 1kg mass hangs from a cord wrapped around a solid disk pulley with a mass of 3kg and radius 25cm. the cord is 2m long
A 46 kg skater is standing still in front of a wall. By pushing against the wall she propels herself backward with a velocity of - 1.2 m/s. Her hands are in contact with the wall for 0.8 s. Ignore friction and wind resistance.
consider a horizontal parallel plate capactor where the size of the plates is much larger than the spacing between the
If the body's efficiency in converting energy stored as fat to mechanical energy is 25%, determine the amount of fat the climber will use up in providing the energy required to work against gravity.
A weightlifter bench-presses a 130.0 kg barbell from his chest to a height equal the length of his arms 0.850 m. How much work does he do? What is the potential energy of the barbell relative to the weightlifter\'s chest after he lifts the barbell
Object A has an emissivity of 0.95; and it temperature is 25 degrees C At what temperature (in degrees C) does object B, whose emissivity is 0.50, emit radiation at the same rate as object A if both objects have the same surface area?
A fixed inductance of 0.18 mH is used in series with a variable capacitor in the tuning section of a radio. What capacitance will tune the circuit to the signal from WSB which is broad casting at a frequency of 750 KHz?
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